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Old 11-02-2012, 08:26 AM   #1
Hinson Motorsports
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• Urethane Engine Mounts •

Interlocking Urethane Engine Mounts for the Pontiac GTO & Corvette C5/C6

MADE IN THE USA!!!

These urethane engine mounts are designed for a great balance between engine control and vibrations. They have been tuned for both street and track applications. Replace your stock rubber mounts for improved throttle response and reduced engine movement.

Features


* Designed for street and race cars
* Direct replacement for stock rubber mount
* Uses factory metric nuts (not included)
* Stainless Steel construction for rust free operation
* Interlocking design for fail safe operation
* Uses factory heat shield (factory heat shield is required)
* Fast installation

Applications


* 2004-2006 Pontiac GTO
* 1997-2012 Corvette C5/C6/Z06

$165

Urethane Engine Mounts GTO/C5/C6
OEM Standard Height
Urethane Engine Mounts (Shorter Version) GTO/C5/C6
.360" Shorter




*Dealers Welcome
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Old 11-02-2012, 08:41 AM   #2
87LC2
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Seriously. A "must do" mod.

Helps getting the power to the ground, you aren't deflecting the mushy stock mounts.
Shifting is greatly improved, never miss third again.
The whole car feels like it was put together better.


I love mine, wish I would've gotten them sooner.


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Old 11-02-2012, 08:42 AM   #3
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Which ones would work best with a Svede OTRCAI? Stock height I'm assuming?
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Old 11-06-2012, 12:45 PM   #4
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Quote:
Originally Posted by 87LC2...View Post
Seriously. A "must do" mod.

Helps getting the power to the ground, you aren't deflecting the mushy stock mounts.
Shifting is greatly improved, never miss third again.
The whole car feels like it was put together better.


I love mine, wish I would've gotten them sooner.





Quote:
Originally Posted by TeaQue...View Post
Which ones would work best with a Svede OTRCAI? Stock height I'm assuming?

Yes.
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Old 11-06-2012, 01:55 PM   #5
05TREXLS2
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Will the shorter engine mounts work if you have a vararam?
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Old 11-06-2012, 02:33 PM   #6
mike27408
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I have the standard length but I may get the shorter ones...they work great
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Old 11-07-2012, 05:34 AM   #7
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I've had these type of engine mounts in every turbo car I've ever had.They did help in the WOT shifting.Gotta get me a set of those.
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Old 11-07-2012, 06:17 AM   #8
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yea urethene engine mounts are one of the best mods you can do especially on a stick car.
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Old 11-07-2012, 11:34 AM   #9
mike27408
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ordered the shorter version a few minutes ago...will sell my standard version ones later on....
Thanks HSC..they are excellent mounts
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Old 11-07-2012, 11:54 AM   #10
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What does the inside look like? What I mean is you have that threaded "rod" section, which I'm assuming is a hex head screw or something, but what prevents it from pulling out? Did they put a big old washer(s) there and such?

Reason I ask is I've seen these before (for other cars) and some people make them right and others don't and you get the "rod" (screw, whatever it is) pulled out of the urethane over time. Hopefully these aren't like that, is all.

Bought some (that were made right vs. vendor X that had issues) for my V, but never installed them...was supposed to be a big improvement and would like to look into something like this for the GTO down the road...a better design incorporates a 2 piece design with a horiz. bushing, but these are a big improvement over the soft rubber and esp. if they were liquid filled form the factory (like the V's).
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Old 11-07-2012, 12:03 PM   #11
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Here is a cut a way.
http://www.ls1gto.com/forums/showthread.php?t=396376

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Old 11-07-2012, 12:15 PM   #12
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How difficult are these to install?
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Old 11-07-2012, 12:15 PM   #13
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We purchased the SC (shorter mounts) in case if we ever wanted or needed to have the motor sit lower. At this time we didn't so I cut two "doughnuts" or "plates" from 1/4" thick sheet of aluminum and placed them over the stud before installing them. It placed the motor almost exactly at stock height. We have the Svede with the radiator mounts "modified" and had NO fitment issues. Thought I had a pic of the mounts when I put them in, just can't find them. Here is a pic of the mounts cut in half to show th interior locking mechanism.

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Old 11-07-2012, 12:18 PM   #14
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P.S.-easy install here. Passenger side went in just by jacking up the motor enough. Drivers side wouldn't go high enough to clear so I just removed the mount from the motor itself, then piece of cake.
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Old 11-07-2012, 12:20 PM   #15
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Beat me to the picture.
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Old 11-07-2012, 12:52 PM   #16
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Cool, thanks for the cutaway and it's good to know they were done right then! (just seen so many where somebody puts a machine screw and maybe small washer facing either way, then molds the polyurethane around those, then wonders why they fail (esp. with headers and the heat).

speaking of which, should we run a heat shield or insulation around these if running headers? I don't know how the GTO is (don't have headers yet), but on the V, something was needed to prevent the excessive heat from messing up the mounts, so the mount I bought had an aluminum heat shield included.
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Old 11-07-2012, 12:56 PM   #17
87LC2
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Reuse stock heat shields and put them back in the original position.
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Old 11-07-2012, 01:19 PM   #18
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I really wish I didn't just spend $200 on the SCSS mounts...
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Old 11-07-2012, 01:23 PM   #19
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Another question, regarding the lower mounts...does this affect the transmission mount and/or the output angle (@ driveshaft)? How about the steering or other things in regard to interference and exhaust alignment and so on?

I know it's only ~3/8", but trying to picture what all would be affected, or what would be the benefit to do this?
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Old 11-07-2012, 02:37 PM   #20
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Quote:
Originally Posted by JNR...View Post
Another question, regarding the lower mounts...does this affect the transmission mount and/or the output angle (@ driveshaft)? How about the steering or other things in regard to interference and exhaust alignment and so on?

I know it's only ~3/8", but trying to picture what all would be affected, or what would be the benefit to do this?

3/8" over the distance from the motor mounts to the trans mount would probably be a fairly small change in angle so it may be splitting hairs to worry about it. Big changes in angles do have to be considered, though. Because a U-joint is not like a constant velocity joint, it actually speeds up and slows down in its rotation so the approach angle at the trans tail needs to be the same as the exit angle at the diff to keep both ends in phase. Here's a link to explain in more detail.......
http://www.hotrodhotline.com/md/html..._harmonics.php

Most of this is way passed my intelligence and perhaps one of our driveshaft vendors can be more helpful. I'm thinking with all the rubber pieces in the stock DS that there won't be any big issues with very small angle changes, but that's just my uneducated guess.


Edit: Also a differential that moves with the axle and suspension is a whole different thing than a diff that doesn't move in an independant rear suspension. What I don't know and can't speak to is how close does everything need to be dialed in.

Last edited by 2step; 11-07-2012 at 03:02 PM.
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Old 11-07-2012, 03:18 PM   #21
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I just received a set of the shorter ones. Been rocking the taller ones for close to two years - love 'em.
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Old 11-07-2012, 03:34 PM   #22
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I want to get the polymounts but 2steps comments worry me anyone elaborate? Also if I plan on getting kooks long tube headers later on will they work fine with these?
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Old 11-07-2012, 03:52 PM   #23
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We have the Kook's stepped headers, no fitment problem. No fitment issues with the rack. Have no clearence problems at all with the mounts. Again, I did put the 1/4" spacer in, so if we need or want to drop it the 3/8" in the future we can. No issues with the driveshaft or joint, no vibrations or noises just better feel all around. No worries.
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Old 11-07-2012, 04:56 PM   #24
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Nev3r.. That is what I plan on putting on my car too

If I buy the regular ones and just install them how they are without the spacers is it going to drop the 3/8?
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Old 11-07-2012, 05:04 PM   #25
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No, if you buy the regular ones, there will no drop and no need for spacers, (stock height). My reason for buying the SC versions was 2 fold. #1, say we supercharge it later on and need the extra clearance up top, at the strut brace (I wouldn't have to purchase them twice). You can make the short ones taller, but not the tall ones shorter. #2, the slightly shorter mount would be a hair, just a hair, firmer than the taller mount which is what I going for anyway.
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Old 11-07-2012, 07:10 PM   #26
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Quote:
Originally Posted by Mitsubishiown...View Post
I want to get the polymounts but 2steps comments worry me anyone elaborate?

Don't worry about my first comment. It's just old school info. A lot of owners have used one or the other of the various thickness mounts, including sagging stockers, with no problems. Get the best you can afford and change them later only if you have hood or header issues.
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Old 12-03-2012, 12:22 PM   #27
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Quote:
Originally Posted by 87LC2...View Post
Seriously. A "must do" mod.

Helps getting the power to the ground, you aren't deflecting the mushy stock mounts.
Shifting is greatly improved, never miss third again.
The whole car feels like it was put together better.


I love mine, wish I would've gotten them sooner.



Just installed mine this weekend. I have to agree with ^^^^
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Old 12-11-2012, 12:05 PM   #28
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Thanks for your orders!
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Old 12-11-2012, 02:19 PM   #29
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pulled the std and installed my shorter versions yesterday...awesome...
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Old 12-11-2012, 03:47 PM   #30
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I like the way mounts help stability and on my old fwd cars killed my wheel hop but they caused massive noise on the inside compared to stock vibrations.

Do these vibrate like crazy like a solid mount or can you tell a difference as far as in cabin noise ?
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